// sqrt.cpp -- use the sqrt() function#include <iostream>#include <cmath>    // or math.hint main(){	using namespace std;		double area;	cout << "Enter the floor area, in square feet, of your home: ";	cin >> area;	double side;	side = sqrt(area);	cout << "That's the equivalent of a square " << side 	     << " feet to the side." << endl;	cout << "How fascinating!" << endl;	return 0;}